Paket doesn't reference libs for UWP apps

[punker76]

Description

If I want to reference a UWP (Universal Windows Platfrom) library to an UWP app with Paket it installs/reference only the .NETFramework ones.

Paket version: 3.26.1

Repro steps

1. Create a Windows Universal Platform app on Win10 with VS 2015 and win sdk 10.0.10240 or higher
2. Add the dependencies for the library at the necessary Paket files

source https://nuget.org/api/v2

nuget MahApps.Metro.IconPacks

and this reference file

MahApps.Metro.IconPacks framework: >= net46

3. call paket install

Here is the git repository with a repro sample.

Expected behavior

It would be nice if Paket has some mechanism to add the dlls also for the UAP target platform.

<When Condition="$(TargetPlatformIdentifier) == 'UAP' And $(TargetPlatformVersion) == '10.0.14393.0'">
  <ItemGroup>
    <Reference Include="MahApps.Metro.IconPacks.Core">
      <HintPath>..\packages\MahApps.Metro.IconPacks\lib\uap10.0\MahApps.Metro.IconPacks.Core.dll</HintPath>
      <Private>True</Private>
      <Paket>True</Paket>
    </Reference>
    <Reference Include="MahApps.Metro.IconPacks">
      <HintPath>..\packages\MahApps.Metro.IconPacks\lib\uap10.0\MahApps.Metro.IconPacks.dll</HintPath>
      <Private>True</Private>
      <Paket>True</Paket>
    </Reference>
  </ItemGroup>
</When>

Actual behavior

Paket references only the .NET framwork part

<When Condition="$(TargetFrameworkIdentifier) == '.NETFramework' And ($(TargetFrameworkVersion) == 'v4.6' Or $(TargetFrameworkVersion) == 'v4.6.1' Or $(TargetFrameworkVersion) == 'v4.6.2' Or $(TargetFrameworkVersion) == 'v4.6.3')">
  <ItemGroup>
    <Reference Include="MahApps.Metro.IconPacks">
      <HintPath>..\packages\MahApps.Metro.IconPacks\lib\net46\MahApps.Metro.IconPacks.dll</HintPath>
      <Private>True</Private>
      <Paket>True</Paket>
    </Reference>
  </ItemGroup>
</When>

I think that Paket could look at these properties of the project file

    <TargetPlatformIdentifier>UAP</TargetPlatformIdentifier>
    <TargetPlatformVersion>10.0.14393.0</TargetPlatformVersion>
    <TargetPlatformMinVersion>10.0.10240.0</TargetPlatformMinVersion>